<div style="margin-top: 20px;">
  <h3>选择文件上传：</h3>
    <div style="margin-top:20px;">
        <input type="file" ng2FileSelect [uploader]="uploader" />
    </div>
    <div style="margin-top:20px;">
        <button nz-button [nzType]="'primary'" (click)="upfile()" style="margin-left: 10px;">
            <span>提交</span>
        </button>
    </div>
</div>